JPH0645432B2 - Hoisting device with vacuum suction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention comprises a vacuum suction device for vacuum-sucking an object,
The present invention relates to a hoisting device with a vacuum suction device that allows hoisting and lowering of a suspended object by a worker himself.

[Prior art]

Conventionally, in a hoisting device that attaches a load hanging hook to the tip of a hoisting chain and hoists and lowers the hoisting chain by rotating the drive motor forward and backward, the operator himself lifts and lowers the object to be hoisted. As an electric chain block that can be operated to wind up and down with a feeling of being, for example, there is an “electric chain block operating device” that the applicant previously applied (Japanese Patent Application No. 62-225).
948). The operating device includes a grip slidably fitted to the tip of a hoisting and lowering chain, a load hanging hook, and an attached tubular body, and a vertical movement detector for detecting vertical movement of the grip. It is configured so that the hoisting and lowering operation can be performed by the vertical movement of. Therefore, this operating device has a feature that the lifting / lowering operation can be performed by a worker himself as if he / she lifts / lowers the suspended object.

[Problems to be solved by the invention]

However, in the operation device for an electric chain block having the above-mentioned configuration, a hanging tool such as a rope is attached to the object to lift the object, the hook at the tip of the chain is hung on the hanging tool, and then the grip is operated to operate the object. Since the hoisting and hoisting work is not only troublesome until the object is hoisted, it is difficult to hoist an object that is inappropriate for mounting a rope or the like, such as a cardboard box. .

The present invention has been made in view of the above-mentioned problems, eliminates the above problems, includes a vacuum suction device having a suction cup for an object, and suspends a rope or the like by a simple operation of moving a movable grip up and down. An object of the present invention is to provide a hoisting device with a vacuum suction device that allows an operator to easily carry an object that is not suitable to be hung up with a feeling of lifting and lowering by an operator himself.

[Means for solving problems]

In order to solve the above problems, the present invention relates to a suction cup that is directly or indirectly attached to the lower end of a hoisting or lowering chain or rope and that is sucked onto the surface of a suspended object, and the suction cup located near the suction cup. A vacuum suction device having a vacuum generator for making a vacuum inside or a non-vacuum inside, and an up and down chain for rotating the drive motor in the forward or reverse direction by operating an operation switch located above the vacuum suction device to instruct up and down movement. Alternatively, the hoisting operation and the hoisting operation may be performed as one cycle while hoisting and lowering the rope, and an operation control unit that repeats suction and non-suction of the vacuum suction device is provided every other cycle, and the vacuum suction device includes a cylindrical body. With a structure in which a vacuum generator is arranged in parallel between a plurality of suction cups arranged at a predetermined interval at the lower end of a frame body attached to the lower end of a hoisting or lowering chain or rope. Ri, operation control means comprises a movable grip vertically moving with the outer periphery of the cylindrical body, characterized by being configured to operate by vertical movement of the movable grip switch is operated.

Further, the operation control means includes a landing detector that detects landing of the vacuum suction device from the looseness of the hoisting chain or rope, and a hoisting detector that detects vertical movement of the movable grip. By the operation of the winding up / down detector, the winding operation and the lowering operation are set as one cycle, and the suction and non-suction of the vacuum suction device are repeated every other cycle.

[Action]

By configuring the hoisting device with the vacuum suction device as described above, by moving the movable grip up and down, the worker can convey the suspended object as if he or she lifted the object.
Further, since the suction and non-suction of the vacuum suction device can be performed only by operating the movable grip, the operation of lifting and lowering the object to be hung up becomes extremely easy.

Further, since the vacuum generator is arranged in the vicinity of the suction cup and the compressor is separately installed, the vacuum loss is reduced and the vacuum generator including the vacuum generator can be downsized.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a front view of a hoisting device with a vacuum suction device according to the present invention, and FIG. 1 (b) is a side view thereof. In the figure, 10 is a vacuum suction device, and the vacuum suction device 1
Reference numeral 0 denotes a vacuum generation device in which a suction cup 13 for suctioning the surface of a suspended object is provided at a predetermined position of the frame body 11, and a vacuum generator for holding the suction cup 13 in a vacuum / non-vacuum state is housed between the suction cups 13. 30 is attached. The structure is such that the air tube 12 is connected to the suction cup 13. A tip end of a cylindrical tubular body 14 is fixed to the frame body 11, and a cylindrical bracket 15 is fixed to a rear end of the tubular body 14.

On the other hand, the bracket 1 is attached to the tip of the winding up / down chain 16.
A piston member 17 that is slidably fitted to the member 5 is attached. The piston member 17 is provided with a predetermined space above and below the collar 17
a and 17b are formed, and the upper portion of the bracket 15 is slidably fitted between the collars 17a and 17b of the piston member 17 with a spring 18 interposed. The upper end of the hoisting and lowering chain 16 is engaged with a hoisting and lowering sprocket (not shown), and the hoisting and lowering chain 16 is moved up and down by forward and reverse rotation of the sprocket. Further, inside the bracket 15, there is provided a limit switch 31 which will be described in detail after being operated by vertically moving the piston member 17.

An air tube 19 and a signal cable 20 are spirally provided on the outer periphery of the winding / winding chain 16, and the air tube 19 and the signal cable 20 are wound in a double spiral shape. In addition, the air tube 19 and the signal cable 20
Communicates with an electromagnetic valve of a vacuum generator, which will be described later, housed in the vacuum generator 30.

A movable grip 21 that slides up and down by a predetermined size is provided on the outer periphery of the cylindrical body 14, and a fixed grip 22 fixed to the cylindrical body 14 is provided below the movable grip 21.

In the figure, reference numeral 23 is an electrical equipment box portion that houses various electrical equipment of the hoisting device, 24 is a speed reducer portion, 25 is a motor portion, 2
Reference numeral 6 denotes a hanging hook for suspending the hoisting device on a ceiling or a trolley, and 27 denotes a chain housing portion for housing the hoisting and lowering chain 16.

In the hoisting device with a vacuum suction device having the above structure, the vertical movement of the movable grip 21 causes the hoisting and lowering chain 16 to move up and down, as will be described in detail later. When the device 10 descends and lands on a suspended object, the hoisting and lowering chain 16 loosens,
The limit switch 31 operates to detect landing, a vacuum is generated as will be described later in detail, and the suction cup 13 is sucked onto the suspended object. When the movable grip 21 is raised in this state, the hoisting and lowering chain 16 is hoisted and the vacuum suction device 10 is raised. When the trolley (not shown) is traversed when the object is lifted to a predetermined position, the vacuum suction device 10 that has sucked the suspended object is moved to a predetermined position.

When the movable grip 21 is lowered in this state, the vacuum suction device 1
When the limit switch 31 detects landing, the vacuum of the suction cup 13 is released. When the movable grip 21 is raised in this state, the vacuum suction device 10
Separates from the suspended object.

The fixed grip 22 is used when the suction cup 13 of the vacuum suction device 10 is positioned and placed at the suction position of the object to be hung.

The specific configuration and operation of the control device that performs the above operation will be described below.

FIG. 2 is a diagram showing a system configuration of the vacuum suction device 10. As shown in the figure, a vacuum generator 51, a filter 52, a branch pipe 53, and a solenoid valve 54 are housed inside the vacuum generator 30. The solenoid valve 54 is a solenoid valve that turns on and off the compressed air sent to the vacuum generator 51 through the air tube 19, and the branch tube 53 is connected to the air tube 12 that communicates with the suction cup 13.

The principle of vacuum generation of the vacuum generator 51 is that the compressed air from the air tube 19 is sent to the nozzle 61 on the primary side 63 via the solenoid valve 54 as shown in FIG.
2 is a vacuum generator for generating a vacuum.

By providing the vacuum generator 51 as described above between the suction cups 13 and 13, that is, in the vicinity of the suction cups 13, the distance from the vacuum generator 51 to the suction cups 13 becomes short, so that the loss is small and the compressor The capacity of each device such as 29 can be reduced, and the balance of the entire hoisting device is improved as compared with the case where the vacuum generator 30 is attached to the main body of the hoisting device together with the speed reducer unit 24, the motor unit 25, and the like.

FIG. 4 shows the cylindrical body 1 of the portion where the movable grip 21 slides.
4 is a sectional view showing the inside of FIG. As shown, the cylinder 1
A limit switch 32 for detecting an upward movement of the movable grip 21 and a limit switch 33 for detecting a downward movement of the movable grip 21 are provided at a predetermined position inside 4. An operating member 34 for operating the limit switches 32 and 33 is fixed to the inner wall of the movable grip 21. Reference numeral 35 is a torsion spring for constantly urging the movable grip 21 to a neutral position, that is, a neutral position (a position shown in the drawing) where the operating members 34 do not operate the limit switches 32 and 33.

FIG. 5 is a circuit diagram showing an operation control circuit for performing suctioning and winding up and down of the hoisting device with a vacuum suction device, and FIG. 6 is a timing chart for explaining the operation. In the figure, 31-1, 31-2 and 31-3 are contacts of the limit switch 31, and 31-1 is the vacuum suction device 10.
3-2 is a vacuum suction device 10
The contact point 31-3 is turned on and off every time the landing is performed, and the contact point 31-3 is turned on and off every time the vacuum suction device 10 is landed. That is, the contacts 31-2 and 31-3 are alternately turned ON-OF.
This is a so-called alternate type contact that repeats F. Also,
Reference numeral 32a denotes a contact of a limit switch 32 which is operated by the upward movement of the movable grip 21, that is, a contact which is turned on when the movable grip 21 is moved upward, and 33a is a contact of a limit switch 33 which is activated when the movable grip 21 is moved downward, that is, a movable grip 21. It is a contact that is turned on by movement. Further, 36 is an electromagnetic switch for hoisting, 37 is an electromagnetic switch for driving a vacuum generator, 38 is an electromagnetic switch for hoisting, and SW is a vacuum switch which is turned on when the vacuum reaches a set value.

In the operation control circuit having the above structure, the vacuum suction device 10 is now used.
Contacting the limit switch 31
It is assumed that 2 is ON, the contact 31-3 is OFF, and the vacuum generator driving electromagnetic switch 37 is operating. In this state, when the movable grip 21 is moved upward, the limit switch 32 is activated and the contact 32a is closed.
When set to N, the vacuum reaches the set value, and when the vacuum switch SW is ON, the hoisting electromagnetic switch 38 operates and the motor rotates in the normal direction to hoist the hoisting and lowering chain 16. As a result, the vacuum suction device 10 moves up while sucking the suspended object, and the contact point 31-1 of the limit switch 31 is turned on. Move the hoisting device and move it at a predetermined position Grip 2
When 1 is moved down, the contact 33a of the limit switch 33 becomes O
N, the lowering electromagnetic switch 36 operates, the motor reverses, and the lowering and lowering chain 16 is lowered. As a result, the vacuum suction device 10 descends, and when landing, the limit switch 3
The contact 31-1 of No. 1 is turned off, and the electromagnetic switch for winding 3
6 becomes inoperable, the motor stops, and the winding up / down chain 1
The lowering of 6 stops.

When the vacuum suction device 10 lands, the limit switch 31
Contrary to the above, the contact 31-2 of is turned off,
-3 is turned on. As a result, the vacuum generator driving electromagnetic switch 37 does not operate and the suction of the suction cup 13 is released, and the suction cup 13 is brought into a non-suction state. When the movable grip 21 is moved upward in this state, the limit switch 32 is activated to turn on the contact 32a. As a result, the hoisting electromagnetic switch 38 operates and the motor rotates in the normal direction, so that the hoisting chain 16
Wind up. As a result, the vacuum suction device 10 moves up without sucking the suspended object, and the contact point 31-1 of the limit switch 31 is turned on. When the hoisting device is moved and the movable grip 21 is moved downward, the contact 3 of the limit switch 33
3a is turned on, the lowering electromagnetic switch 36 operates, the motor reverses, and the lowering and lowering chain 16 is lowered. When the vacuum suction device 10 descends and lands, the limit switch 31
Contact 31-1 of is turned off, and the electromagnetic switch for winding 36
Becomes inoperative and the motor stops, and the winding up / down chain 16
Unwinding stops. By landing the vacuum suction device 10,
The contact 31-2 of the limit switch 31 is turned on again, and the contact 31-3 is turned off. As a result, the vacuum generator driving electromagnetic switch 37 is activated again, and the same operation as described above can be performed.

FIG. 7 is a circuit diagram showing another operation control circuit for performing suction and hoisting and lowering of the hoisting device with the vacuum suction device, and FIG. 8 is a timing chart for explaining the operation.
In the drawing, 31-4 is a contact of the limit switch 31, which is turned on when the vacuum suction device 10 lands, 3
Similarly, 1-5 are contacts of the limit switch 31 which are turned off by landing. Reference numeral 39 denotes a ratchet relay, which operates each time the contact point 31-4 is turned on, and operates so that the contact point 39a is alternately turned on and off for each winding up and down operation. Reference numeral 40 denotes a vacuum generating solenoid, which is activated each time the contact 39a is turned on.

In the operation control circuit having the above structure, the vacuum suction device 10 is now used.
Is in the landing state, and the contact point 31-of the limit switch 31-
4 is turned on, and the contact 39a of the ratchet relay 39 is turned on.
In this state, the vacuum generating solenoid 40 is in the operating state. If the movable grip 21 is moved upward in this state,
The contact 32a of the limit switch 32 is turned on, and the hoisting electromagnetic switch 38 is turned on. As a result, the motor rotates in the normal direction, the hoisting and lowering chain 16 is hoisted, and the suction cup 13 of the vacuum suction device 10 rises while sucking the suspended object.

When the hoisting device is moved to a predetermined position and the movable grip 21 is moved downward, the limit switch 33 is actuated, and the contact 3
3a is turned on, the lowering electromagnetic switch 36 is turned on, the motor is rotated in the reverse direction, the winding up / down chain 16 is lowered, and the vacuum suction device 10 is lowered. When the vacuum suction device 10 lands, the limit switch 31 operates to turn on its contact point 31-4 and turn off its contact point 31-5. When the contact 31-5 is turned off, the lowering electromagnetic switch 36 becomes inoperative, and the lowering of the vertical winding chain 16 is stopped. Further, when the contact 31-4 is turned on, the ratchet relay 39 is activated and the contact 39a is opened. As a result, the vacuum generating solenoid 40 is deactivated, the suction of the suction cup 13 is released, and the suction cup 13 is brought into a non-suction state.

When the movable grip 21 is moved upward in this state, the limit switch 32 is activated and the contact 32a thereof is turned ON. As a result, the hoisting electromagnetic switch 38 operates, the motor rotates normally, the hoisting and lowering chain 16 hoists, and the vacuum suction device 1
0 rises without adsorbing the suspended object. When the hoisting device is moved to a predetermined position and the movable grip 21 is moved downward, the limit switch 33 operates and the contact 33a of the limit switch 33 becomes O.
N, the winding electromagnetic switch 36 is turned ON, the winding vertical chain 16 is lowered, and the vacuum suction device 10 is lowered. When the vacuum suction device 10 lands, the limit switch 3
1 operates to turn on its contact point 31-4 and turn off the contact point 31-5. When the contact 31-5 is turned off, the lowering electromagnetic switch 36 becomes inoperative, and the lowering of the vertical winding chain 16 is stopped. Also, the contact 3-4 O
The ratchet relay 39 is activated by N, and its contact 3
Close 9a. As a result, the vacuum generating solenoid 40 operates and the suction cup 13 is brought into a suction state. As described above, even when the ratchet relay 39 is used instead of the alternate contacts 31-2 and 31-3 in FIG. 5, the operation is similar to that of the operation control circuit in FIG.

In the above embodiment, the so-called electric chain block having the hoisting and lowering chain 16 is described as an example, but the hoisting device according to the present invention is not limited to this. It goes without saying that it may be a so-called electric hoist equipped with a wire rope.

Also, the operation control circuit is not limited to the circuit configuration shown in FIGS. 5 and 6, and the point is that the vacuum suction device 1
By operating the operation switch located on the upper part of 0, the vertical movement is commanded to rotate the drive motor forward or reverse to wind up and down the hoisting or lowering chain or rope, and the hoisting operation and the hoisting operation are set as one cycle, As long as the operation control means repeats suction and non-suction of the vacuum suction device every other cycle, its specific circuit configuration is a relay circuit as shown in FIGS. 5 and 7, or an electronic circuit such as a transistor circuit. It may be configured.

〔The invention's effect〕

As described above, according to the present invention, the following excellent effects can be obtained.

It is operated by the vertical movement of the movable grip, and the vertical movement is commanded to rotate the drive motor forward or backward to wind up or down the hoisting chain or rope, and the hoisting operation and the hoisting operation are set as one cycle, and every other cycle. Since it is equipped with operation control means for repeating suction and non-suction of the vacuum suction device, suction, lifting and lowering of the suspended object are performed in one cycle of up and down operation of the operation switch or up and down movement of the movable grip. The vacuum suction device can be moved up and down in a non-adsorption state of the suspended object by one cycle of operating the operation switch up and down or moving the grip up and down.
A hoisting device with a vacuum suction device, which is extremely easy to operate, can be obtained.

Since the vacuum generator is arranged in the vicinity of the suction cup and the compressor is separately installed, it is possible to reduce the vacuum loss and downsize the vacuum generator including the vacuum generator.

Since the vacuum generators are arranged side by side between the suction cups, the vertical dimensions of the luggage and the operating section can be set short,
The operation of the operation unit becomes easy.

[Brief description of drawings]

FIG. 1 (a) is a front view of a hoisting device with a vacuum suction device according to the present invention, FIG. 1 (b) is a side view thereof, FIG. 2 is a diagram showing a system configuration of the vacuum suction device, and FIG. The figure for demonstrating the principle of the vacuum generation of a vacuum generator, FIG. 4 is sectional drawing which shows the inside of the cylinder of the part which the said movable grip slides, FIG.
FIG. 7 is a circuit diagram showing an operation control circuit for performing suction and hoisting of the hoisting device with the vacuum suction device, FIG. 6 is a timing chart for explaining the operation, and FIG. 7 is a hoisting device with the vacuum suction device. FIG. 8 is a circuit diagram showing another operation control circuit for performing suction and hoisting and lowering of the upper device, and FIG. 8 is a timing chart for explaining the operation thereof. In the figure, 10 ... vacuum suction device, 11 ... frame, 12 ...
Air tube, 13 ... Suction cup, 14 ... Cylinder, 1
5 ... Bracket, 16 ... Chains for winding up and down, 17 ...
... Piston member, 18 ... Spring, 19 ... Air tube, 20 ... Signal cable, 21 ... Movable grip, 22 ... Fixed grip, 23 ... Electrical equipment box part, 24 ... Reduction gear part, 25 ... ... Motor part, 26 ... Hanging hook, 27 ... Chain storage part, 28 ... Air tube, 29 ... Compressor, 30 ... Vacuum generator, 31 ... Limit switch, 32,33 ... Limit switch , 35 ... Coil spring, 36 ... Unwinding electromagnetic switch, 37 ... Vacuum generator driving electromagnetic switch, 38 ...
… Electromagnetic switch for hoisting, 39 …… Ratchet relay, 40
...... Vacuum generating solenoid.

Claims (2)

[Claims] 1. A suction cup which is directly or indirectly attached to the lower end of a hoisting or lowering chain or rope and which adsorbs to the surface of a suspended object, and a vacuum or non-vacuum inside the suction cup located near the suction cup. And a vacuum suction device having a vacuum generator, and a drive motor is normally or reversely rotated by operating an operation switch located above the vacuum suction device to instruct vertical movement, to wind up the vertical chain or rope. The lowering operation and the lowering operation are defined as one cycle,
An operation control means for repeating suction and non-suction of the vacuum suction device every other cycle, wherein the vacuum suction device is provided at a lower end of a frame attached to a lower end of the hoisting chain or rope with a cylinder interposed. It is a configuration in which the vacuum generators are arranged in parallel between a plurality of suction cups arranged at a predetermined interval, and the operation control means includes a movable grip that moves up and down on the outer periphery of the cylindrical body. A hoisting device with a vacuum suction device, wherein the operating switch is operated by moving the movable grip up and down. 2. The operation control means comprises a landing detector that detects landing of a vacuum suction device from looseness of a hoisting or lowering chain or rope, and a hoisting and lowering detector that detects vertical movement of the movable grip, By the operation of the landing detector and the winding up / down detector, the hoisting operation and the lowering operation are set as one cycle, and the suction and non-suction of the vacuum suction device are repeated every other cycle. A hoisting device with a vacuum suction device according to item (1).